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  1. O

    Seeking a job with high school diploma,help please.

    Can't really help you on the job front, but as far as the age you will be starting college, no, not at all! I went to college at 27, and there was people there older then me. Seán
  2. O

    Trying to understand difference equation

    Hello, I hope someone can help me with a problem I am having. It is neither homework or coursework, but for my own understanding. I should say from the start, I am one of those people who tend not to be able to see the forset because all the trees are in the way, so I probably will be...
  3. O

    MATLAB MATLAB FFT question

    Hi, thanks for the reply! I think zeroing the bin that has the frequency of the DC component is the best way to work it, I will try that. Can't believe I didn't think of that haha. I have used the 'axis' command for a few scaling problems, but I think setting the elements to zero will do that...
  4. O

    MATLAB MATLAB FFT question

    Hello, I am hoping someone can give me some advice. I need to zero out the DC component of an FFT I have done, so I can get a better look at the rest of the frequency components, so how would one go about doing that? I am not looking the code, just some advice ...I have just really started...
  5. O

    Trying to understand rewritten equation

    Hello, And thanks for the reply. Yea, sorry about writing it like I did ..I am not too familiar with LaTeX. Well, the common denominator is x0, which will give the x0-(x0+Δx)
  6. O

    Trying to understand rewritten equation

    Hello, I am hoping someone can help me understand something. I was watching one of the MIT OCW videos and it ran through the following Δf/Δx = (1/(x0+Δx - 1/x0)) / Δ0 can be rewritten as Δf/Δx = 1/Δx (x0-(x0+Δx) / (x0+Δx)x0) But I am not sure how this was done. I hope someone...
  7. O

    Rearranging equation to find back gate bias

    Thanks! That did it ...for some reason, I was multiplying 1.05 by the bracket, and going from there ...which was just making things complicated. Again, thanks!! Seán
  8. O

    Rearranging equation to find back gate bias

    Hello, I am having a bit of an issues rearranging an equation for my solid state electronics class. I seem to have a mental block with this sort of stuff, so I am hoping someone can help. The equation is 0.34 = 1.05((0.64 + |VBS|)1/2 - (0.64)1/2) I know the usual stuff, like + to a -...
  9. O

    New graduate experience

    Hello. I hope everyone is well. I was just wondering about experience for a recent graduate ...I am doing an MSc in Electronics, and will be spending about 8-9 months in our device fabrication lab on a part-time and then full time basis (full time over the summer). Could this be put...
  10. O

    Schottky barrier Rectifying characteristics

    Hey, Thanks for the reply. You're right, rectifying characteristics means it allows current to flow in one direction, and blocks in the other. Which clears that up at least, and explains why you want ohmic contacts. The research is progressing anyway haha ...I am writing an interim...
  11. O

    Schottky barrier Rectifying characteristics

    Ha ...no worries ...I am not even sure I have it right myself. Many thanks. Seán
  12. O

    Schottky barrier Rectifying characteristics

    Hey, thanks for the reply. I am trying to research reducing the barrier height in transistors. From what I have been reading it says that when the metal and semiconductor for a pn junction, the contact can have a Schottky barrier which exhibits rectifying characteristics. I may have this...
  13. O

    Schottky barrier Rectifying characteristics

    Hello, A Schottky barrier is said to have rectifying characteristics, which from what I can understand is bad ...but would the rectifying characteristics mean that current passing through the junction would be flat ....level is probably a better way to describe it rather than flat. I only...
  14. O

    Trying to understand an integration example

    Hello, Thanks for the reply. Right, yea, I think I understand that ...I will run through it a few times just to make sure. Thanks. -S
  15. O

    Trying to understand an integration example

    Hello. I am having some trouble understanding an integration example we have. I have written it out in the attached pdf. I would be grateful if someone can help me undertand what is going on. I assume you let a = (x-RP)/(√2 ΔRP) da to make the process easier, but I am, not sure how that...
  16. O

    USB power

    That's great, thanks!! I figured it was something along those lines, but I was 100%. Many thanks. -S
  17. O

    USB power

    Ah sorry. I meant voltage into the USB. I obviously didn't pay too much attention to what I was writing. Sorry. So, I take it there is a regulator on the input to the USB, which will take it down to the required spec? -S
  18. O

    USB power

    Hello. This is probably a silly question. But it is something I haven't been able to find an answer too. When I connect something to my laptop through the USB, I know that there is 5V coming from the USB connection ...there are many pinout diagrams about that show this. But what is the...
  19. O

    Multiplying and subtracting coordinates

    Oh, sorry ....I just figured it out! Taking a break and coming back to it does help. ....just a thought, should I explain how it is done in case anyone else is looking to know this sort of thing? I don't know what the protocol would be on that. Slán -S
  20. O

    Multiplying and subtracting coordinates

    Hello, I am hoping someone can help me understand a problem in a text book. It just assumes you know how to do a littel bit of maths, which I don't, and haven't been able to figure out. S11 = 0.894 \angle -60.6 S21 = 3.122 \angle 123.6 S12 = 0.020 \angle 62.4 S22 = 0.781 \angle -27.6...
  21. O

    Hey guys

    Hello. Well, I guess it depends excatly what you want to do ...technology is a bit of a wide term. However, have you looked at the Open University? You can get funding for the courses ...You apply through the OU, not through the students loan company as you would with a traditional brick...
  22. O

    Engineering Designing a matching circuit for maximum power transfer

    I'm pretty sure it can be located anywhere between the source and load. -S
  23. O

    Bachelor's Applied Math - Should I buy MATLAB?

    In my university, there is a copy of MATLAB on every computer in the engineering buildings (and I assume the maths department too) as well as the library ...but they do not distribute it to students. There is some software freely available, bit MATLAB ain't one of them ....shame. -S
  24. O

    Engineering Designing a matching circuit for maximum power transfer

    Hello. I need to design a matching circuit to provide maximum power transfer from a generator with impedance Zg to a load with impedance ZL. The matching circuit has a length of transmission line with impedance Z0 and short circuit or open circuit stub with impedance Zs. I need to design with...
  25. O

    RC Networks and complex numbers

    I get it now. Many thanks! -S
  26. O

    RC Networks and complex numbers

    Thanks :) Okay, so, I know the frequency is 2GHz, which gets me ω. But what is Zc, is that the 80 in the complex number? -S
  27. O

    RC Networks and complex numbers

    Hello. I maybe should have put this in the maths section, but it is related to electronics, so I figured here. I am reading Microwave Engineering by Pozar, and in one of the examples, it says that the series RC load impedance is ZL = 60 - j80, so the resistance is 60 Ohms and the...
  28. O

    Wavelengths along a Smith Chart

    Ahh, okay ...I am with you now! That's fantastic. Thanks for your help. -S
  29. O

    Impedance and MOS transistors

    Hello. In a class today, the lecturer said, in an introduction to the material that will be covered, something along the lines of "..and the current is kept relatively flat (low?) thanks to impedance ..." Is this because impedance acts like resistance (but in AC circuits), or would there be...
  30. O

    Hey guys

    Haha pure genius! -S
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